Journal of the Acarological Society of Japan
Online ISSN : 1880-2273
Print ISSN : 0918-1067
ISSN-L : 0918-1067
Original Papers
Development, Reproduction and Prey Consumption of the Thrips Predator Gynaeseius liturivorus (Ehara) (Acari: Phytoseiidae)
Masatoshi MOCHIZUKI
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JOURNAL FREE ACCESS

2009 Volume 18 Issue 2 Pages 73-84

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Abstract

Gynaeseius liturivorus is an indigenous predatory mite that feeds on small arthropods. I investigated its development period on diets of Frankliniella occidentalis eggs and several life-history parameters on diets of Thrips palmi larvae. The developmental periods of females from egg to adult emergence ranged from 3.09 days at 27.5°C to 9.55 days at 15°C 95.7% to 100% of eggs hatched and 75% to 95% of hatched larvae developed to adults. The lower threshold temperature from egg to adult female was 8.8°C and the total effective temperatures of female adult development were 63.7 degree-days. Proportion of females was 0.759 among the 311 individuals tested. Females laid an average of 36.7 eggs at 20°C and 36.1 eggs at 25°C The intrinsic rates of natural increase (rm) were 0.205 at 20°C and 0.305 at 25°C G. liturivorus fed on the larvae of F. occidentalis, T. palmi and Scirtothrips dorsalis. Females consumed an average of 7.4-19.4 1st-stadium larvae of these thrips within the first 24 hrs and laid an average number of 1.6-6.8 eggs within 24-48 hrs. These data suggest that G. liturivorus is promising for biological control agents against thrips.

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© 2009 by The Acarological Society of Japan
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